ERRATA. 



Page 75, 14th line, for " Tricha" read Taricha. 

 " 81, 3d line, for " carbondioxide " read carbon dioxide. 

 "" 89, last line, for "fig. 2 " read fig. 3. 

 " 94, 22d line, for " urodelos " read urodelous. 

 " 99, 22d line, for " T. cristalus " read T. cristatus. 

 " 100, 6th line from bottom, for "Amblystonea" read 



Amblystoma. 

 " 101, 6th line, for " object " read objects. 

 " 104, 17th line from bottom, for "Amb/ystomea " read 



Amblystoma. 

 " 106, 8th line, for "C/iond?-otus h(g-tibris" read Chon- 



drotus tencbrosus. 

 " 106, 17th line, for " Cadis " read Caddis. 



